add videos, update dedup and lazy load image

group-similar.js

@@ -151,7 +151,7 @@ async function groupImages(lines, baseDir, threshold, stats) {
     while (j < lines.length) {
       /** @type {TextNode[]} */
       const blanks = [];
-      while (j < lines.length && isBlank(lines[j])) {
+      while (j < lines.length && lines[j].type === "text") {
         // isBlank already guarantees type === "text"
         blanks.push(/** @type {TextNode} */ (lines[j]));
         j++;